基于悬臂共振法的IPMC杨氏模量的动力学测定方法  

Dynamic Determination Method Based on Cantilever Resonance for IPMC Young's Modulus

作　　者：郝丽娜[1] 高建超[1] 刘洪涛[1] 

机构地区：[1]东北大学机械工程与自动化学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2011年第10期1464-1467,共4页Journal of Northeastern University(Natural Science)

基　　金：国家高技术研究发展计划项目(2008AA04Z305);国家自然科学基金资助项目(51075066);中国科学院沈阳自动化研究所机器人学国家重点实验室资助项目(RL0200903)

摘　　要：针对目前IPMC智能材料杨氏模量的测定存在方法单一、破坏材料本身等问题,提出了一种基于悬臂共振法的动力学测定方法.该方法通过激励装置使IPMC发生有阻尼自由衰减振动,采用激光位移传感技术记录其振动历程,然后对采集到的信号进行分析处理,从而得到其基频,最后采用悬臂共振法建立IPMC的横向振动方程,引入边界条件即可计算出其杨氏模量.这种方法与目前存在的拉伸法和弯曲法相比,具有测试方便简单、对材料本身不产生破坏、测定结果精度高等优点.A dynamic determination method based on cantilever resonance was presented to solve the crude and material-damage problems of current ways in measurement of IPMC Young＇s modulus.An incentive device was applied to bring the IPMC into the damping free vibration state,which was recorded by a laser displacement sensor.The fundamental frequency was obtained by analyzing and processing the collected signal.A transverse vibration equation was established on the basis of the cantilever resonant vibration,and the IPMC Young＇s modulus can be then calculated by introducing boundary conditions.Compared with the existing tensile and bending tests,the proposed method has advantages of convenience and simpleness,non-destructive testing and high measurement accuracy.

关 键 词：智能材料 IPMC 悬臂共振 杨氏模量 激光位移传感技术 

分 类 号：TB333[一般工业技术—材料科学与工程]